Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5c0dc3de54b08ee…

MALICIOUS

PDF

50.4 KB Created: 2020-08-03 15:59:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 33d31f14a664c658c488c3fc5aabd2ce SHA-1: 18679a9a5f2257ba9aae6fbb6ddc2a0160d75c08 SHA-256: a5c0dc3de54b08ee6a610a59021fb599c4d25c4dbe366cb38b488f1383f278a9
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link that redirects to a known malicious domain (ttraff.com), indicating a phishing or redirection attempt. The document body, though heavily obfuscated, contains this URL and other Shopify links, suggesting a link farm or SEO poisoning tactic to lure users. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/pify?keyword=function+of+rough+endoplasmic+reticulum+pdf
    • http://files.1stdivisionrangers.org/uploads/1/3/0/9/130969384/kerej.pdf
    • http://files.franklinhsband.net/uploads/1/3/1/3/131398360/lokibufatetojuw-beluwoferule-foseletatutevij.pdf
    • http://files.radiantsunrisewellness.com/uploads/1/3/1/4/131453902/pejakisadub.pdf
    • http://files.thefashionanalyst.com/uploads/1/3/1/3/131383624/wezunawe.pdf
    • https://cdn.shopify.com/s/files/1/0433/7228/2008/files/dalovire.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fesitoxerevujadutag.pdf
    • https://cdn.shopify.com/s/files/1/0430/8919/9268/files/zilerosubanemanuk.pdf
    • https://cdn.shopify.com/s/files/1/0428/4570/0262/files/47098798030.pdf
    • https://cdn.shopify.com/s/files/1/0435/9025/4749/files/vivowadixiletavulu.pdf
    • https://cdn.shopify.com/s/files/1/0430/9798/1089/files/xafubimeziran.pdf
    • https://cdn.shopify.com/s/files/1/0429/6038/8252/files/muxejiwesojexemugufumarex.pdf
    • https://cdn.shopify.com/s/files/1/0430/3070/8385/files/61182787423.pdf
    • https://cdn.shopify.com/s/files/1/0433/4642/8072/files/calculus_2nd_edition_rogawski_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ziduvawijixivobufanevi.pdf
    • https://cdn.shopify.com/s/files/1/0433/7103/6822/files/29370777931.pdf
    • https://cdn.shopify.com/s/files/1/0433/8391/4654/files/satowajanux.pdf
    • https://cdn.shopify.com/s/files/1/0429/1916/6105/files/44720442775.pdf
    • https://cdn.shopify.com/s/files/1/0434/0632/7959/files/29329444149.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000876e.bin
5d94891bd80b7e73b7729dfc4275f1781fbbb53bf4f74cd51cd4fc5c5614f19c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x876E 5524 bytes
font_01_sfnt_off00009a12.bin
ebd8647dd3486f6a052419651f0a2aa85a0d728939d012d33ba7f2a5636aa98c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A12 9904 bytes

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